package com.youku.expression.ast;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.youku.expression.environment.Environment;

public class NullStatementAst extends Ast{

	private static final Logger logger=LoggerFactory.getLogger(NullStatementAst.class);
	
	@Override
	public String toString() {
		return "空语句";
	}

	@Override
	public Object eval(Environment environment) {
		logger.info("空语句，不执行");
		return null;
	}

}
